Which term of the AP 3,10,17....will be 84 more than its 13th term
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Step-by-step explanation:A.P:3,10,17,...
a=3
d=10-3=7
a13=a+(n-1)d
=3+(13-1)7
=3+12*7
=3+84
=87
The term 84 more than its 13th term,
a(n)=84+87
a+(n-1)d=171
3+(n-1)7=171
3+7n-7=171
7n-4=171
7n=171+4
7n=175
n=175/7
n=25th term
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